Suction nozzle of vacuum cleaning apparatus



Feb.'4, 1936. l.. F. MCCARDLE SUCTION NOZZLE OF VACUUM CLEANINGAPPARATUS Filed May 51, 1954 NEY- HIS ATTO Patented Feb. 4, 1936 PATENTOFFICE SUCTION NOZZLE F VACUUM CLEANIN APPARATUS Lionel Frank McCardle,Durweston Mews,

, England Application May 31, 1934, serial No'. 728,452 In Great BritainMarch 2, 1933 Claims.

This invention relates to vacuum cleaning apparatus and moreparticularly to suction nozzles therefor which are adapted to be movedby a handle over the surface of the carpet, for example, to be cleaned,the lower surface of the nozzle being formed with a nozzle openingincluding a recess that communicates with the suction hose whereby thedust, nui, hair and other matter is extracted from the carpet and drawnthroughl the hose into the bag or dust container.

The object of the present invention is to provide an improvedconstruction which provides for the thorough cleansing of the surface ofthe carpet, all matter that is apt to cling thereto such as cotton yarn,hairs, and fluff being effectively removed.

A further object of my invention is to provide an improved constructionin which a brush is enclosed within a nozzle and so arranged that thebrush is adapted to be moved into contact with the surface to becleaned.

A still further object of the present invention is to provide animproved nozzle which is divided into two parts one of which is movablerelatively to the other and each of which in itself forms an effectivenozzle.

It is known to enclose a brush within a suction nozzle and to arrangefor the brush to be adjusted toward and away from the surface to becleaned. According to the present invention, the brush is normally heldback by springs from that surface, for example a carpet. Pressuredownward on the handle, however, will bring the brush into contact withthe carpet.

In a preferred embodiment of the invention, an auxiliary suction nozzleis flxed alongside the brush and is arranged to movev therewith withinthe main suction nozzle. A more'concentrated suction is thereby providedalong the brush when this is depressed into operative position.

llf it is desired one or more apertures vmay be provided in the mainsuctionnozzle to permit air to enter the nozzle and to pass through thebrush to increase its effectiveness and t keep it clean.

But in order that this and other features of the invention may beclearly understood reference should now be made to the accompanyingdrawing in which similar-reference characters relate to like parts inall' the figures and in which:

Figure 1 is a plan of the double nozzle as viewed from the top and 4Figure 2 a plan viewed from below,

Figure 3 is a longitudinal section on the line A-B Figure 1, and

Figure 4 a cross section on the line C-D of the same figure.

On referring to the drawing it will be` seen that the under surface ofthe nozzle base plate u, is formed with the central recess b and endrecesses c ordinarily communicating with the passage e leading to theswivel fitting f in which the tube g is mounted that forms a handle forthe movement of the nozzle and is connected to the suction hose. In thepresent improved construction the passage e is a vertical slot formed ina central detachable block h slidably mounted in a rectangular slot k inthe base plate a and formed with a lower horizontal flange m carryingthe vertical rods n at each end that pass upwards through the hollowbosses o at each end of the base plate (1. and .are encircled by thesprings p. The lower ends of the springs p bear against thecircumferential ledges q in the base of the bosses o while their upperends press against the caps 1' that flt into the upper ends of thebosses o the tension of the springs p being adjusted by the pins spassing freely through holes in the caps r and engaging threaded holesin the rods n.

By these means the under surface of the block h with the recesses t andu therein is normally maintained above the level of the under surface ofthe base plate a with its recesses b and c but by pressure appliedthrough the handle g to the fitting f, that is swivelably attached tothe upper surface of the block h by the barrel hinges v, the block I1.is lowered so that its under surface is in contact with the carpet andthe suction effect is concentrated within the recesses t and u and thiscombined with the action of the brush mounted ina cut-away of theundersurface of the flange m of the block h, effectively removes anyobstinate clinging matter. On relaxation of pressure on the block h itreturns to its normal position by the action of the springs p.

A slot w cut through the forepart of the nozzle base plate a andcommunicating with the recess b admits a jet of air to the under surfaceof the plate which facilitates the movement of the nozzle over any kindof carpet and materially assists the cleansing of its surface. Moreoverwhen the interior nozzle h is brought into operation it tends to cleanthe brush :n.i

It Willbe understood that variations in the structure may be made withinthe spirit and scope of the invention as defined in the appended claims.

I claim:

l. In a vacuum cleaner a nozzle comprising two telescopically mountednozzle members, the inner member having a nozzle opening materiallysmaller than that of said outer member and being normally out of contactwith the surface to be cleaned and so arranged that by telescoping saidmembers the nozzle opening of the inner member may be brought intocontact with the surface to be cleaned within the area of the nozzleopening of the outer member.

2. In a vacuum cleaner a nozzle comprising two telescopically mountednozzle members resiliently secured in expanded relationshipsubstantially normal to the surface to be cleaned, the inner memberhaving a nozzle opening materially smaller than that of said outermember and being out of contact with the surface to be cleaned and soarranged that by telescoping said members the nozzle opening of theinner member may be brought into contact with the surface to be cleaned.

3. In a vacuum cleaner a nozzle comprising two telescopically mountednozzle members, the inner member having a nozzle opening materiallysmaller than that of said outer member, said nozzle opening being in adifferent plane from that of the nozzle opening of the outer member andsubstantially parallel thereto, said inner member being arranged totelescope in a direction substantially normal to the surface to becleaned and within the outer member so as to bring the nozzle opening ofthe two members into substantially the same plane.

4. In a vacuum cleaner a nozzle comprising an inner nozzle membertelescopically mounted within an outer nozzle member, the inner memberhaving a nozzle opening materially smaller than that of said outermember, the plane of said nozzle opening being above and substantiallyparallel to the plane of the nozzle opening of the outer member, ahandle pivotally secured to said inner member, said members being soarranged that by pressure on said handle the nozzle openlng of the innermember may be brought into the same plane as the nozzle opening of theouter member.

5. In a. vacuum cleaner a nozzle comprising two telescopically mountednozzle members, the inner member having a nozzle opening materiallysmaller than that of said outer member, spring means normally holdingthe inner member out of contact with the surface to be cleaned and in adirection substantially normal thereto and means for exerting pressureon said inner member to force the nozzle opening of said inner memberinto contact with the surface to be cleaned within the area of thenozzle opening of said outer member.

6. In a vacuum cleaner a nozzle comprising two telescopically mountednozzle members the inner member being normally out of contact with thesurface to be cleaned, a brush member secured to said inner member, thewhole being so arranged that by telescoping said members the nozzleopening of the inner member together with the brush may be brought intocontact with the surface to be cleaned, said outer member having anopening therein adjacent the position of said brush when said innermember is brought into contact with the surface to be cleaned fordirecting a current of air across said brush.

7. Vacuum cleaning apparatus comprising a nozzle member provided with a,handle movable with respect thereto, a brush enclosed by said nozzlemember, means for supporting said brush includingspring means forholding said brush away from the surface to be cleaned, said handle eingso connected and arranged with respect to said nozzle member and saidbrush supporting means that pressure thereon will move said handle withrespect to said nozzle member to force said brush into contact with thesurface to be cleaned within said nozzle member.

8. Vacuum cleaning apparatus comprising a nozzle member provided with ahandle movable with respect theretoa brush enclosed by said nozzlemember, means for supporting said brush including spring means forholding said brush away from the surface to be cleaned, said handlebeing so connected and arranged with respect to said nozzle member andsaid brush supporting means that pressure thereon substantiallyperpendicular to the surface to be cleaned will move said handle withrespect to said nozzle member to force said brush into contact with thesurface to be cleaned within said nozzle member.

9. Vacuum cleaning apparatus comprising a main nozzle member providedwith a handle, a brush and auxiliary nozzle enclosed by said main nozzlemember, means for supporting said brush and auxiliary nozzle includingspring means for holding the same away from the surface to be cleaned,said handle being connected to said brush and nozzle supporting means sothat pressure thereon will move said brush and auxiliary nozzle withinsaid main nozzle member into contact with the surface to be cleaned.

10. Vacuum cleaning apparatus comprising a nozzle member provided with ahandle movable with respect thereto, agitating means enclosed by saidnozzle member, means for supporting said agitating means includingspring means for holding said agitating means away from the surface tobe cleaned, said handle being so connected and arranged with respect tosaid nozzle member and said agitating means that pressure thereon willmove said handle with respect to said nozzle member to force saidagitating means into agitating relationship with the surface to becleaned within said nozzle member.

LIONEL F. MCCARDLE.

